5: S
PECIAL
F
UNCTIONS
FC5A M
ICRO
S
MART
U
SER
’
S
M
ANUAL
FC9Y-B1268
5-21
Two-phase High-speed Counter Functions (Slim Type CPU Modules)
Counting Mode and
Maximum Counting Frequency
1-edge count: 100 kHz
2-edge count: 50 kHz
4-edge count: 25 kHz
Counting Range
0 to 4,294,967,295 (32 bits)
Gate Control
Enable/disable counting
Current Value Reset
Current value is reset to the reset value when reset input I2 (HSC1) or I5 (HSC4) is turned
on or when a reset input special internal relay M8032 (HSC1) or M8046 (HSC4) is turned
on.
In addition, when any of current value comparison (preset value 1, preset value 2, over-
flow, or underflow) is true, the current value can be reset to the reset value. The current
value comparison is designated in the Function Area Settings.
Current Value Keep
When current value comparison for preset value 1 or preset value 2 is true, the current
value can also be kept to count subsequent input pulses, without resetting the current
value to the reset value.
Status Relays
Special internal relays for indicating high-speed counter statuses.
Comparison
Action
Comparison
Output
A comparison output turns on when any of current value comparison (preset value 1, pre-
set value 2, overflow, or underflow) is true.
Any output number available on the CPU module can be designated as a comparison out-
put. Output numbers on expansion output or mixed I/O modules cannot be designated as
a comparison output.
Interrupt Program
Program execution jumps to a tag when any of current value comparison (preset value 1,
preset value 2, overflow, or underflow) is true.
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